RASPBERRY PI 1 MODEL A+
The Model A+ is the low-cost variant of the Raspberry Pi. It replaced the original
Model A
in November 2014. Compared to the Model A it has:
•
More GPIO.
The GPIO header has grown to 40 pins, while retaining the same
pinout for the first 26 pins as the Model A and B.
•
Micro SD.
The old friction-fit SD card socket has been replaced with a much
nicer push-push micro SD version.
•
Lower power consumption.
By replacing linear regulators with switching
ones we’ve reduced power consumption by between 0.5W and 1W.
•
Better audio.
The audio circuit incorporates a dedicated low-noise power
supply.
•
Smaller, neater form factor.
We’ve aligned the USB connector with the board
edge, moved composite video onto the 3.5mm jack, and added four squarely-
placed mounting holes. Model A+ is approximately 2cm shorter than the
Model A.
We recommend the Model A+ for for embedded projects and projects which
require very low power, and which do not require Ethernet or multiple USB ports.
https://www.raspberrypi.org/products/model-a-plus/
7/28/2016
嵌入式系统